Transcript AdaptAerTrn.ppt

Adaptations to chronic
endurance training:
increase capillary density
increase oxidative enzymes
increase mitochondrial density
TR individual reach Steady
State more rapidly than UNTR
why?
Submaximal work:
TR and UNTR will have the same oxygen
cost
TR will exercise at lower HR
TR will exercise at lower intensity
Fat catabolism during low
intensity exercise
low intensity: 5 kcal/min
most (72%) derived from fat
3.6 kcal from fat, 0.4 gms of fat
double intensity: 10 kcal/min
45% of energy is derived from fat
4.5 kcal/min, 0.5 gm of fat
e.g., 5 kcal/min for 60 min = (5
X 60) = 300 kcals, 24 gm fat
10 kcal/min for 45 min = 450
kcals, 22.5 gm fat
Therefore, should you
encourage some one to
exercise at low intensity to
“burn more fat”?????
Fat facts:
fat utilization decreases when exercise
follows a high CHO meal (increase in
circulating insulin)
fat utilization decreases when lactate
begins to accumulate
ability to use fat as a fuel increases with
training